Clostridium difficile

Clostridium difficile has been recognized as the cause of a broad spectrum of enteric disease ranging from mild antibiotic-associated diarrhea to pseudomembranous colitis. This volume gives new insights into the microbiology, diagnostics and epidemiology

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Editors R.W. Compans, Atlanta/Georgia M . Cooper, Birmingham/Alabama · Y. Ito, Kyoto H. Koprowski, Philadelphia/ Pennsylvania· F. Melchers, Basel M . Oldstone, La Jolla /California · S. Olsnes, Oslo M. Potter, Bethesda/ Maryland P.K. vogt , La Jolla /California · H . Wagner, Munich

Springer-Verlag Berlin Heidelberg GmbH

Clostridium difficile Edited by K. Aktories and T.D. Wilkins

With 20 Figures and II Tables

Springer

Prorcssor Or.Dr. KLAlJS AKTOR IF.S AI berl-l ud wigs- U n vcrsihl i t F rciburg. Instilut fUr Pharm:Jko logic ulld Toxikologic Hcrmann-Hcnlcr-Str. 5 79 104 Freiburg i.Br. Gcrmany E-lIIai/: aklOrics(/I' uni-rrciburg.dc

Or. T"'A('Y D. WILKINS Directo r o r Bi olL"Chnology Virginia Tech Frd lin Biotcchno logy Ccnler Wcst Campus Drivc. MC 0346 Blacksb urg. VA 24061

USA

E-mail: tracyw(II'YI,edu

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ISSN 0070-21 7X ISBN 978-3-642-08668-7 ISBN 978-3-662-06272-2 (eBook) DOI 10.1007/978-3-662-06272-2 This work i•• ,,1>;''''1 1" ~"I'yrillhl, AII rillht, arc f\:",n'l.~1. Wh,·Ih..'r 11o~ ... h,,1Îon r.. r U,", n'II.,1 "1",,)"' ..... "l>lain,'Il 1'",,,, Spi,..,...vorlq, Balin HcidclbaJ OmbH,

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Genetics of nos/ridil/III di/ficil" Toxins

37

toxin B, is a potent cytotoxin for epithelial cells of intestinal origin such as HT-29 cells (TUCKER et al. 1990). These cells have a high density of carbohydrate receptors for toxin A. Rounding of intoxicated cells is accompanied by disassembly of the actin micro filaments. Microtubules and intermediate filaments are only secondarily affected (FIORENTINI et al. 1990; MITCHELL et al. 1987; OTTLINGER and LIN 1988; THELESTAM and BRONNEGARD et al. 1980). Although the microfilament cytoskeleton is preferentially affected, actin itself is not the target. Rearrangement of actin and the aetin binding proteins vi